Affiliation: | aSchool of Civil, Urban, and Geosystem Engineering, Seoul National University, San 56-1, Shinlim-dong, Gwanak-gu, Seoul 151-742, South Korea;bDepartment of Civil and Environmental Engineering, Sejong University, 98 Kunja-dong, Kwangjin-gu, Seoul 143-747, South Korea;cSchool of Civil, Urban, and Geosystem Engineering & Engineering Research Institute, Seoul National University, San 56-1, Shinlim-dong, Gwanak-gu, Seoul 151-742, South Korea |